A pre-release of my acceleration logger files for critique Not guaranteed to work! All licensed under CC-BY-SA 3.0
Summary: Dimensions: 1.25in x 2.5in * 1in Induction charged. Supercapacitor is charged by LT1618 from the coil(P2) and Bridge rectifier. Optical communications, serial@56kbaud Mating charging/comms circuit not yet designed Updatable firmware 8Mbyte onboard flash Charges in <5 minutes with coil supplying 5v at a yet to be determined current (depends on charger) Powered from 5V, 5F supercap with LT1615-1 SEPIC Converter Linear postregulator for low noise Quiescent current < 200uA May or may not be potted, depending on requirements. Potted version is watertight. P1 for programming AVR + 2 GPIO & Serial Low power: <3mA at 1ksps for >30min battery life Fast sampling: 3 axis sampling at 1ksps/Axis 3-axis 200g full-scale, 100mg resolution 16-200g Sub 16-g resolution better than 5 mg 4-layer board, believed to meet OSH park's design rules (Mostly) Arduino-compatible Atmega1284p processor Open Source -- CC-BY-SA 3.0